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pwm: change default_value for all boards from 1000 to 0

Browse Source 
the value '1000' is not really magic, and it was resulting in sending
a single 1ms pulse on all IO channels for a brief instant on
startup. With some servos this led to the control surfaces being at
extremes (and straining) on startup. It may also contribute to making
ESC calibration harder on multi-rotors

In the worst case it could cause a IC motor with reverse throttle to
go full throttle on startup

A logic analyser shows the problem very clearly. Changing the
default_value fields to 0 from 1000 fixes the issue and no pulses are
generated until an explicit value suitable for the airframe is
provided via one of the many methods PWM output values can be
generated

Conflicts:
	src/drivers/boards/px4fmu-v4/px4fmu_pwm_servo.c
	src/lib/ecl
This commit is contained in:
Andrew Tridgell
2016-01-29 15:03:51 +11:00
committed by Lorenz Meier
parent e6db5e2db1
commit b8a60f2501
5 changed files with 32 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/drivers/boards/px4fmu-v1/px4fmu_pwm_servo.c
+4 -4
View File
@@ -64,24 +64,24 @@ __EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
.gpio = GPIO_TIM2_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM2_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM2_CH3OUT,
.timer_index = 0,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM2_CH4OUT,
.timer_index = 0,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
}
};
src/drivers/boards/px4fmu-v2/px4fmu_pwm_servo.c
+6 -6
View File
@@ -70,36 +70,36 @@ __EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
.gpio = GPIO_TIM1_CH4OUT,
.timer_index = 0,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH3OUT,
.timer_index = 0,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH2OUT,
.timer_index = 1,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH3OUT,
.timer_index = 1,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
}
};
src/drivers/boards/px4fmu-v4/px4fmu_pwm_servo.c
+6 -6
View File
@@ -70,36 +70,36 @@ __EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
.gpio = GPIO_TIM1_CH4OUT,
.timer_index = 0,
.timer_channel = 4,
.default_value = 900,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH3OUT,
.timer_index = 0,
.timer_channel = 3,
.default_value = 900,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 900,
.default_value = 0,
},
{
.gpio = GPIO_TIM1_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 900,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH2OUT,
.timer_index = 1,
.timer_channel = 2,
.default_value = 900,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH3OUT,
.timer_index = 1,
.timer_channel = 3,
.default_value = 900,
.default_value = 0,
}
};
src/drivers/boards/px4io-v1/px4io_pwm_servo.c
+8 -8
View File
@@ -76,48 +76,48 @@ __EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
.gpio = GPIO_TIM2_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM2_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH3OUT,
.timer_index = 2,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH4OUT,
.timer_index = 2,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH1OUT,
.timer_index = 1,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH2OUT,
.timer_index = 1,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH3OUT,
.timer_index = 1,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH4OUT,
.timer_index = 1,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
}
};
src/drivers/boards/px4io-v2/px4io_pwm_servo.c
+8 -8
View File
@@ -76,48 +76,48 @@ __EXPORT const struct pwm_servo_channel pwm_channels[PWM_SERVO_MAX_CHANNELS] = {
.gpio = GPIO_TIM2_CH1OUT,
.timer_index = 0,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM2_CH2OUT,
.timer_index = 0,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH3OUT,
.timer_index = 2,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM4_CH4OUT,
.timer_index = 2,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH1OUT,
.timer_index = 1,
.timer_channel = 1,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH2OUT,
.timer_index = 1,
.timer_channel = 2,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH3OUT,
.timer_index = 1,
.timer_channel = 3,
.default_value = 1000,
.default_value = 0,
},
{
.gpio = GPIO_TIM3_CH4OUT,
.timer_index = 1,
.timer_channel = 4,
.default_value = 1000,
.default_value = 0,
}
};